My buddy just came into this, and I found the schematic below. Not the best-known old Gibby, it seems. The paper caps and especially the filter caps gotta be replaced before power up methinks. I know it's 5Y3 rectified with a pentode preamp, SE into *parallel* 6V6s. And a field coil speaker, about which I know bupkis. So: Thoughts, experience, info, links? The TV fronts were made ???1954 to '56 or '57? What say you?